Just got off the phone with Bill Miller. As soon as I asked him he knew this guy, Bill said "Oh man, THAT guy! He's a !@#%ing LIAR!"
Bill said that he has never played with this guy, and that Roy has gone around telling people that he actually beat Bill out for a Grammy once. Bill said, "Everything about that man is fake. Fake name, fake music, fake tribe, claiming he found his father's bones and stuff, and he's making all sorts of money on this crap. This guy may be one of the worst human beings I have ever met. TOTAL fraud."
I asked Bill for his permission to post his answer here and he said, "Yeah, absolutely! This guy is a @#^ing lunatic. If he's even using my name at all, I'll do whatever I can to make sure he's not associated with me."